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Comprehensive Description

provided by Smithsonian Contributions to Zoology
Oithona plumifera Baird, 1843

Oithona plumifera Baird, 1843:59.—Kiefer, 1929:4.—Mori, 1937:109, pl. 60: figs. 3–15.—Sewell, 1947:255.—Nishida et al., 1977:140–142, figs. 14, 15.

MATERIAL.— and from PN-13-60, PN-14-60, PN-18-60, PN-19-60, PN-20-60, PN-21-60, PN-23-60, PN-25-60, PN-26-60, PN-29-200, PN-32-200, PN-33-200, PN-35-200, PN-58-200, PN-59-200, PN-62-200, PN-63-200, and Alpha Helix Sta 5.5.

FEMALE.—Length range (30 specimens) 1.06–1.28 mm; Pr/Ur-1.1. Ur2 (Figure 10a) with tuft of hairs on anteroventral surface and small row of spinules posterior to knob near genital opening; knob with small, thin spine and spinule ventral to it. As Crisafi (1958) has noted, Ur4 with 2 rows of 4 thick hairs on anteroventral margin; lengths of hairs increase laterally (Figure 10b); Ur5 with lateral and dorsal rows of hairs (Figure 10c). CR also with hairs on posteromedial edge. A1 with tiny hairs, without associated pores, on 1–10 free segments (Figure 15f); Ri2P4 both setae modified; thick, curved with flange over distal ; curvature of distal seta more pronounced; Ri3P4 with proximal seta modified; thick, slightly curved toward tip, with flange on distal . Re3P4 St plumose on distal of medial edge. P5 with hairs on medial edge.

MALE.—Length range (30 specimens) 0.59–0.68 mm; Pr/Ur-1.5. Cph flap (Figure 10h) much thinner than O. hebes; digitiform; attenuate end reaching beyond posterior edge of Pg1. Pore signature similar to O. hebes. Anterodorsal cluster not organized into columns; posterior to this, horizontal row curves ventrally onto Cph flap and converges with 11th column. Ventral to horizontal row 10 distinct columns on Cph; 11th on flap. Ventrally, columns continue anteriorly as horizontal series. Posterior to 11th column, flap with 2 chevrons and peripheral organs along posterior edge.
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cc-by-nc-sa-3.0
bibliographic citation
Ferrari, Frank D. and Bowman, Thomas E. 1980. "Pelagic copepods of the family Oithonidae (Cyclopoida) from the east coasts of Central and South America." Smithsonian Contributions to Zoology. 1-27. https://doi.org/10.5479/si.00810282.312

Distribution

provided by World Register of Marine Species
Cosmopolitan except for Arctic
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copyright
WoRMS Editorial Board
bibliographic citation
van Breemen, P.J. (1906). Mariene copepoden [Marine copepods]. <i>Fauna van Nederland</i>, 1. E.J. Brill: Leiden, The Netherlands. 31 pp. North-West Atlantic Ocean species (NWARMS)
contributor
Kouwenberg, Juliana [email]

Distribution

provided by World Register of Marine Species
(By that time?) this species rarely passes south of the Doggerbank.
license
cc-by-4.0
copyright
WoRMS Editorial Board
bibliographic citation
van Breemen, P.J. (1906). Mariene copepoden [Marine copepods]. <i>Fauna van Nederland</i>, 1. E.J. Brill: Leiden, The Netherlands. 31 pp. North-West Atlantic Ocean species (NWARMS)
contributor
[email]

Habitat

provided by World Register of Marine Species
pelagic species
license
cc-by-4.0
copyright
WoRMS Editorial Board
bibliographic citation
van Breemen, P.J. (1906). Mariene copepoden [Marine copepods]. <i>Fauna van Nederland</i>, 1. E.J. Brill: Leiden, The Netherlands. 31 pp. North-West Atlantic Ocean species (NWARMS)
contributor
Mary Kennedy [email]